<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="headImg">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 表单区域 -->
      <el-form
        ref="loginRef"
        label-width="0px"
        class="login_form"
        :rules="loginFormRules"
        :model="loginForm"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            placeholder="请输入用户名"
            prefix-icon="iconfont icon-user"
            v-model="loginForm.username"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            placeholder="请输入密码"
            prefix-icon="iconfont icon-3702mima"
            v-model="loginForm.password"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 登录按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resets">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 这是登陆表单的数据绑定对象
      loginForm: {
        username: '',
        password: '',
      },
      //这是表单的验证规则对象
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名称', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  methods: {
    //重置登录信息
    resets() {
      this.$refs.loginRef.resetFields()
    },
    //发送登录请求
    login() {
      //表单预验证,验证通过为true,否则为false
      this.$refs.loginRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$https.post('login', this.loginForm)
        if (res.meta.status != 200) {
          return this.$message.error('登录失败')
        } else {
          sessionStorage.setItem('token', res.data.token)
          this.$message.success('登录成功')
          this.$router.push('/home')
        }
      })
    },
  },
}
</script>

<style lang="less" scoped>
.login_container {
  background: #2b4b6b;
  height: 100%;
  .login_box {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 450px;
    height: 300px;
    background: #fff;
    border-radius: 3px;
    transform: translate(-50%, -50%);
    .headImg {
      position: absolute;
      left: 50%;
      width: 130px;
      height: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      transform: translate(-50%, -50%);
      background-color: #fff;
      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
    .login_form {
      position: absolute;
      bottom: 0;
      width: 100%;
      padding: 0 20px;
      box-sizing: border-box;
      .btns {
        display: flex;
        justify-content: flex-end;
      }
    }
  }
}
</style>